Island



WITNESSES,

(No Model.)

W T.'CO0PER. BOLT HEADING AGHINE.

No.27'7,01. Pat ented May 8.1883.

llllllll ll INVENTOR- 1 UNITED. STATES PAT NT OFFICE.

WILLIAMH. HASKELL COMPANY, OF SAME PLACE. Y

BOLT-HEADING MACHINE.

. SPECIFICATION forming part of Letters Patent No. 277,010, dated May 8, 1883.

Application filed December 21, 18? (No model) To all whom it may concern Be it known that I, THEOD RE COOPER, of Pawtucket, in the county of Providence and Stateof RhodeIsland, have invented a new and useful Improvement in Bolt-Heading Machines; and 1 do hereby declare that the following specification, taken intconnection with the accompanying drawings, forming a part of samefis afull, clear, and exact description thereof. y In bolt-heading machines of the variety known as .hot-forging machines it isnecessary' that the revolution of the shaft shall be stopped, and. the swaging action upon the head of the blank thereby cease, in order that the headed blank may be removed from the machine and afreshfrod beinserted to be headed. It isalsonecessary that theshaft be stopped at a definite point in its path of revo lution, and that it shall be held at that point,

in order that certain parts of the machine'may be in position to allow the blankto be freely discharged anda new rod tobe inserted.

As usually constructed the shaftof the machine is provided with one member of a clutch, which member is in the form of a block or platehaving a latch or tooth projecting from oneof its sides and held in an extended posi- I tion bya spring, and the driving-pulley is. U30

provided with; the other member of the clutch,

looselyi mounted'on the shaft, and, its hub is p which member is in the form of a notch or shonl deradapted to engage the latch or'tooth, and thereby'drjve the shaft. The stopping of the shaft has been effected by unclutching it from thepulley and, moving a pivoted arm into the path of revolution of a. lugprojecting radially from theshaft. The engagement of the a arm andlug would stop the forward rotation 40 of the shaft, andthe tendencyfor the shaft to rebound was attempted to be overcomeby causing the shal'tto run with considerable friction.

The objectionsto a machine tllllSfGOlifitIllOtEd are that,friction being constantly applied to" the shaft, greater power is required to run the machine, and the bearings wear very fast and require to becoustantly tightened to make them effective for the purpose of preventing a recoil of the shaft when it is stopped, and the 5o pivoted arm, or theframe of the machine, would ping and preventing the recoil of the drivingshaft; and it consists in a stop arranged to be TH ODORE COOPER, on PAWTUCKET, RHODE ISLAND, ASSIGNORVTO'THEV swung into the path of movement of the lug on the shaft, which stop will arrest theforward movement of said shaft if it has been unclutched from the driving-pulley-and will yield and allow the shaft to continue to revolve without. damage to the machine if the un-. clutching has not been effected.

m The invention also consists in providing the machine with a stop to prevent a recoil ofthe arrested shaft, and in making said stop yielding so that no damagecan occur thereto in the event that the shaft continues to revolve.

Referring to the drawings, Figure l represents in side'elevation a portion of a boltheading machine embodying my invention,

the two stops beingshowu in rearward posi-..

tion, the stops being in position tohold the shaft. Fig.3 represents atop view and partial section of a portion of the machine.

A is the frame of the machine, in and upon which the various parts are mounted.

tion. Fig. 2 shows the same in partial sec- 3 B is the shaft, and be lug projecting radially therefrom. l I p G is a block or plate forming a part of one member of the clutch, which is secured to the shaft. is provided witha latch or tooth, D, which is normally projected beyond the edlge of the block by a spring, d, the ainountof projection being determined by the engagement of a pin, 61, secured to the latch with the end ofta slot, (1 as shown in Fig. 3. The outer end of the pin d bears a roller, (1 t I E is the continuously-revolving driving-pub ley, the hub of which is chambered to. admit the block 0, and is provided with a shoulder, c, to engage the latch D, as shown in Fig. 1. The pulley is loosely mounted on the shalt B, but will continue to drive the shaft so long as the'shouldereengages the latch D, and will thereby cause the ram F to perform its work of sw aging the head upont'he blank.

For disconnecting the shoulder a and latch D, for the purpose of stopping the revolution As shown.iu Figs. 1 and 3, this block 7 tendant of the machine.

of the shaft B, the machine is commonly provided with a lever, G, having a curved carnface, 9. This, lever is pivoted to the frame of themachine, and is connected by a link,h, to an arm, H, upon one end of a rock-shaft, H. Also connected to the arm H is a rod, J, which is extended to a convenient point and attached to a lever to be operated by the at: The normal position of the cam-face g on the lever G is below and without .the circle described by the roller d during its revolution with and around the shaft B, the position being that shown in Fig. 1. By moving forward the rod J the lever G is elevated to the position shown by dotted lines inFig. 2, so that the roller at will come in contact with the cam-face g and will be gradually raised, and the latch D thereby be withdrawn until it no longerengages the shoulder on the pulley-hub.

Attached to the opposite end of the roclp' shaft H is an arm, K, which is provided with a pin, k. This pin engages a slot, 1, in the end of an arm, L, which arm is pivoted to the frame of the machine, and is attached to a barrel, M, containing a stop latch, N, which is seated on a spring, a, as shown in Fig. 2, in order to make it yielding. The normal position of the upper'end of the stop-latch N is without the path of revolution of the lug b on the shaft B, as shown in Fig.1; but when the shaft H is rocked by a movement of thelever .J,' to bring the lever G into position to unclutch the shaft from, the driving-pulley, the arm L, barrel M, and contained stop-latch N are swung into the position shown. in Fig. 2, so that the upper end'of the latch N will be in "position to arrest the rotation of the shaft B,

by the engagement of the lug b therein with the latch N.

As the machine is organized, the unclutching of the shaft from the driving-pulley is fully effected just as' the lug b comes in contact with the latch N. If, however; the attendant should not have moved the rod J suffioiently to properly elevate the lever G, and the unclutching should not be fully effected, the spring it, upon which the latch Nis seated, will allow said latch to yield and be forced rearward by the revolving lug b without damage to the machine.

For preventing a recoil of the shaft B there is arranged vertically on the frame of the machine a spring-latch, O, which is cushioned on a spring, 0, located in a bracket, P. The lower end of the spring-latch O is provided with a pivoted finger, Q, the upper end of which is.

normally pressed outward by a spring, q, in order that the lower end ofthe finger shall be without the path of revolution of the lug b, as

shown in Fig. 1, during the normal revolution of the'shaft B.

which contains a rod, S, 'seafid on a spring, 8, in order that it. may be yielding. When the barrel M and its latch N are swung forward the bracket R and its rod S are also moved forward. This brings the rods S into contact with the lower end of the finger Q, and the spring 8 being much stronger than the spring q the finger is moved from its normal position shown in Fig. 1 to the position shown in Fig. 2, in readiness to prevent the recoil of the shaft after the lug b shall have come in contactwiththelatch N. Before this contact can be effected, however, the finger Q will be swung rearward by the moving lug b, since the finger is now in its path of revolution. The spring 8, however, will allow of such movement of the finger, and it will promptly return the finger to the position to prevent the recoil of the shaft so soon as the lug 1) passes out of engagement with the finger, as shown in Fig. 2. The shaft B therefore will be positively held in a definite position by the stop-latch N and the stop-latch O Q until such time as the stoplatch N is moved rearward and out of en gagementwith the lug b by a rocking of the shaft H.

While the shaft B is held between the stoplatches the headed bolt-blank is discharged from the machine and a new rod upon which a head is to be swaged is placed therein. The rod J is now moved by the attendant to retreat the stop-latoh N and rod S, and to retreat the lever G in order that the latchD may be projected to be engaged by the shonlder 6 on the revolving driving-pulley, and the shaft thereby be again put into revolution.

As shown in Figs. 1 and 2, a weight, '1, is preferably employed to balance the barrel M and its contents, and thereby enable these parts more readily to be moved into position.

What I claim, and desire to secure by Letters Patent, is

1. The combination ofa revolving shaft providedwith a lug, as described, means for unclutching said shaft from its source of motion, a spring stop-latch for arresting the motion of "the shaft, and suitable means, as described,

for moving said latch into a position to arrest the movement of the shaft and for retreating the latch, substantially as set forth. I

2'. The combination of arevolving shaft provided with a lug, as described, means for un- Y clutching said shaft from its source of motion,

a spring stop-latch for arresting the motion of 1 the shaft, a spring stop-latch for preventing Ia recoil of the shaft, and suitable means, as

described, for bringing said latches intoaction I and for retreating the same, substantially as set forth.

THEODORE COOPER.

Witnesses:

W. H. THURSTON, I. KNIGHT.

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